Amend 2020 return through Turbotax before filing state

I filed my federal 2020 tax return in Feb, but then received a corrected 1099 and will need to amend it. I have not received my refund yet, although Turbotax says that my return was accepted (e-filed). Based on the program, the corrected 1099 will reduce my refund by $3. I have not filed my state return yet. My question has two parts. First, do I need to wait until I receive my refund before filing the amended federal return?

Second, the program says that the IRS has not released the information to do the amended section yet. Can I go ahead and make the changes and then file my state return before I am able to file my amended federal return?